The Connecticut Air & Space Center is presenting an educational display of historical artifacts and photos that tell the history of 550 Main Street in Stratford, Conn. The buildings at 550 Main Street saw Igor Sikorsky develop his seaplane business, which help fund his invention the helicopter. It saw World War II on the horizon and the property expanded to build the US Navy’s best fighter, the F4U Corsair. It saw Lycoming, Avco, Textron, Allied Signal and finally the US Army create military engines by the truckload at the Stratford Army Engine Plant. Now, shuttered since 1998, 550 Main Street waits for to be developed for a new generation.